• Revista médica de Chile · Jan 2020

    Comparative Study Observational Study

    [Comparison between self-reported and device measured physical activity according to nutritional status].

    • Miquel Martorell, Ana María Labraña, Karina Ramírez-Alarcón, Ximena Díaz-Martínez, Alex Garrido-Méndez, Fernando Rodríguez-Rodríguez, Igor Cigarroa, Jaime Vásquez, Yeny Concha, María Adela Martínez-Sanguinetti, Ana María Leiva, Cristian Álvarez, Fanny Petermann-Rocha, Carlos Salas-Bravo, and Carlos Celis-Morales.
    • Departamento de Nutrición y Dietética, Facultad de Farmacia, Universidad de Concepción, Concepción, Chile.
    • Rev Med Chil. 2020 Jan 1; 148 (1): 37-45.

    BackgroundIt is unknown if nutritional status could influence the accuracy of self-reported physical activity (PA) levels.AimTo compare PA measured using the international physical activity questionnaire (IPAQ) and by accelerometry (ActiGraph) according to nutritional status in Chilean adults.Material And MethodsThis is an observational cross-sectional study that used information from the GENADIO project carried out in Chile between 2009-2011. The sample consisted of 322 people. PA levels and sitting time were determined through the IPAQ self-report questionnaire and ActiGraph accelerometers (GTM1). The nutritional status was determined according to body mass index (BMI).ResultsCompared with the measurement made with accelerometry, the IPAQ self-report questionnaire underestimated the levels of light PA, total PA and sedentary time in -171.5, -54.8 and -40.6 min / day, respectively. However, IPAQ overestimated the levels of moderate PA and vigorous PA in 91.0 and 47.3 min/day respectively, compared with accelerometry. Compared with normal weight, obese subjects reported higher levels of moderate PA (105.5 and 48.9 min/day, respectively) and vigorous PA (54.1 and 38.3 min/day respectively). Total PA had a greater delta of underestimation between IPAQ and accelerometer measurements in normal weight than in obese subjects (-122.1 vs -16.5 min/day, respectively).ConclusionsThe measurement of PA by means of a self-report questionnaire was discrepant with its objective measurement with an accelerometer. The discrepancy is even higher in obese people.

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